System and method for pit detection and sizing

Pending Publication Date: 2022-11-10
JENTEK SENSORS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a method where a first rapid scan is performed to detect any potential defects in a sample. Once a suspected defect is detected, slower scans are then performed to provide higher data resolution. This allows for more accurate identification of defects and ensures better quality control.

Problems solved by technology

However, no widely used method has advanced, leaving visual inspection as the most widely used method.
Furthermore, even when visual inspection can detect the presence of early corrosion or corrosion pitting, the remediation actions are left without knowledge of severity or depth of corrosion.
This results in high costs that could be avoided if a reliable method was available to assess the depth of corrosion pitting.

Method used

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  • System and method for pit detection and sizing
  • System and method for pit detection and sizing
  • System and method for pit detection and sizing

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Embodiment Construction

[0037]Non-destructive inspection of materials is critical for many applications, but such inspections can be challenging because of object geometry, material, and access issues. The inventors have recognized and appreciated the need for improved inspection procedures and equipment with which to perform such challenging inspections. An eddy current sensor with a linear drive conductor and multiple sensing elements at a fixed distance from the linear drive, where data is recorded simultaneously on the multiple sensing elements is used to enable reliable pit detection and enhanced pit sizing. In some embodiments, a signature library of representative pits derived from actual pits on service exposed parts (or from drilled holes representing pits) is used to process the data. The library of signatures is collected on pits from service that are later destructively tested to determine the depth, and / or from drilled holes that represent pits in the material of interest and under the geometr...

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Abstract

A system and method are disclosed for enhancing pit detection and sizing in a test object. Response signatures are created and stored in a signature library to characterize various sensor responses (liftoff, orientation) and pit properties (e.g., depth, width), possibly with or without additional considerations (e.g., edges, cracks). A sensor is placed on and scanned across a surface of interest on the test object. During scanning the sensor is measured repeatedly at regular intervals. An encoder may be used to record the sensor position for each measurement. The measurement results are then correlated with one or more signatures in the signature library. A threshold is used to determine if the correlation is indicative of the detection of a pit. If so additional processing may be performed to estimate pit properties.

Description

RELATED APPLICATION[0001]The present application claims priority under 35 U.S.C. § 119(e) to U.S. provisional patent application, U.S. Ser. No. 63 / 185,421, filed May 7, 2021 which is herein incorporated by reference in its entirety.GOVERNMENT SUPPORT[0002]The invention was supported, in whole or in part, under contract N68335-18-C-0200, from the U.S. Navy. The Government has certain rights in the invention.TECHNICAL FIELD[0003]The present disclosure relates to the field of non-destructive evaluation (NDE).BACKGROUND[0004]NDE can be used to evaluate the condition of materials at and during production, prior to deployment, periodically during deployment, and after deployment. NDE for corrosion pits is needed in a wide array of applications including: aircraft skins, bolt holes in aircraft, turbine blades, gun barrels, piping and pipelines, bridges, and other high value assets. Often it is desired to inspect through paint, coatings / insulation or under challenging surface conditions. Th...

Claims

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Application Information

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IPC IPC(8): G06T7/00G01N21/95
CPCG06T7/001G01N21/9515G06T2207/30136
InventorGOLDFINE, NEIL J.WASHABAUGH, ANDREW P.WINDOLOSKI, MARK
OwnerJENTEK SENSORS